Reference Guide To English – A Handbook Of English As A Second Language

I before E
achieve, believe, view, friend, field, relief, siege

except after C
ceiling, conceit, deceive, perceive, receive, receipt

or when sounded as an a
as in neighbor or weight;
eight, freight, rein, reign, sleigh, veil, vein

either, Neither, leisure, Seize
are Exceptions; …h for these!
caffeine, codeine, conscience, counterfeit, forfeit, foreign, heifer, heir, protein, sovereign, weird